Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Pergunta: indique a rodada que teve um placar de jogo de 50-10.
 ###Tabelas: CREATE TABLE race_record (race_record_id AUTO_INCREMENT PRIMARY KEY, Race VARCHAR, Dist (f) INT, Course VARCHAR, Class VARCHAR, Prize (£K) INT, Odds VARCHAR, Runners INT, Placing INT, Margin VARCHAR, Time VARCHAR, Jockey VARCHAR, Trainer VARCHAR) CREATE TABLE south_africa (south_africa_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Date of Birth VARCHAR, Batting Style VARCHAR, Bowling Style VARCHAR, First Class Team VARCHAR) CREATE TABLE administrative_divisions (administrative_divisions_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Hanzi VARCHAR, Hanyu Pinyin VARCHAR, Population (2004 est.) VARCHAR, Area (km²) VARCHAR, Density (/km²) VARCHAR) CREATE TABLE council_composition (council_composition_id AUTO_INCREMENT PRIMARY KEY, Party VARCHAR, Previous council INT, Staying councillors INT, Seats up for election INT, Election result INT, New council INT) CREATE TABLE fixtures_and_results (fixtures_and_results_id AUTO_INCREMENT PRIMARY KEY, Competition VARCHAR, Round VARCHAR, Opponent VARCHAR, Result VARCHAR, Score VARCHAR, Home/Away VARCHAR, Venue VARCHAR, Attendance INT, Date VARCHAR)  
SELECT Round FROM fixtures_and_results WHERE Score = 50-10